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Causal connectivity according to conscious experience in non-rapid eye movement sleep
Lee, Minji; Baird, Benjamin; Gosseries, Olivia et al.
2019In Conference Proceedings - IEEE International Conference on Systems, Man and Cybernetics, 2019-October, p. 2133-2138
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Keywords :
Brain; Electroencephalography; Electrophysiology; Functional electric stimulation; Brain connectivity; Brain-machine interfacing; Cortical mechanisms; Effective connectivities; Frontal regions; Human consciousness; Non-rapid eye movements; Transcranial magnetic stimulation; Eye movements
Abstract :
[en] The understanding of human consciousness based on brain connectivity is considered important for brain-machine interfacing. In this study, we investigated changes in causal connectivity in electroencephalography data related to conscious and unconscious experiences during non-rapid eye movement sleep after parietal transcranial magnetic stimulation (TMS). A serial awakening paradigm was used to determine whether subjects had had a conscious experience or not. We calculated direct transfer function (DTF) as a measure of effective connectivity in five frequency bands focusing on frontal and parietal-occipital regions. The DTF showed significant differences in frontal-to-parietal flow between reported unconsciousness and consciousness. During the first 100 ms after TMS, the outward links of the parietal region at low frequencies were higher in no conscious experience than in conscious experience. During the next 100 ms, however, the outward links of the frontal region were higher in the conscious experience than the no conscious experience at low frequencies. Changes with causal connectivity over time after TMS indicate that the spatial roles in brain regions associated with consciousness are different. These findings may help clarify the cortical mechanisms related to conscious experience. © 2019 IEEE.
Disciplines :
Neurosciences & behavior
Author, co-author :
Lee, Minji;  Korea University, Department of Brain and Cognitive Engineering, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, South Korea
Baird, Benjamin;  University of Wisconsin, Department of Psychiatry, Madison, WI 53719, United States
Gosseries, Olivia  ;  Université de Liège - ULiège > Consciousness-Coma Science Group
Nieminen, Jaakko O.;  Aalto University School of Science, Department of Neuroscience and Biomedical Engineering, Espoo, 02150, Finland
Boly, Mélanie;  University of Wisconsin, Department of Psychiatry, Madison, WI 53719, United States
Tononi, Giulio;  University of Wisconsin, Department of Psychiatry, Madison, WI 53719, United States
Lee, Seong-Whan;  Korea University, Department of Brain and Cognitive Engineering, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, South Korea
Language :
English
Title :
Causal connectivity according to conscious experience in non-rapid eye movement sleep
Publication date :
2019
Event name :
2019 IEEE International Conference on Systems, Man and Cybernetics, SMC 2019
Event date :
6 October 2019 through 9 October 2019
Journal title :
Conference Proceedings - IEEE International Conference on Systems, Man and Cybernetics
ISSN :
1062-922X
Publisher :
Institute of Electrical and Electronics Engineers Inc.
Volume :
2019-October
Pages :
2133-2138
Peer reviewed :
Peer reviewed
Funders :
Horizon 2020 Framework Programme, H2020: EU-H2020-fetopenga686764, 785907, SGA2Bat Conservation International, BCI2017-0-00451, IITPAcademy of Finland: 294625MH064498
Commentary :
155660 9781728145693
Available on ORBi :
since 16 January 2020

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